Buggy code:
public void copyFile ( String sourceFile , String destFile , FilterSetCollection filters , Vector filterChains , boolean overwrite , boolean preserveLastModified , String encoding , Project project ) throws IOException { } public void copyFile ( String sourceFile , String destFile , FilterSetCollection filters , Vector filterChains , boolean overwrite , boolean preserveLastModified , String inputEncoding , String outputEncoding , Project project ) throws IOException { } public void copyFile ( File sourceFile , File destFile ) throws IOException { } public void copyFile ( File sourceFile , File destFile , FilterSetCollection filters ) throws IOException { } public void copyFile ( File sourceFile , File destFile , FilterSetCollection filters , boolean overwrite ) throws IOException { } public void copyFile ( File sourceFile , File destFile , FilterSetCollection filters , boolean overwrite , boolean preserveLastModified ) throws IOException { } public void copyFile ( File sourceFile , File destFile , FilterSetCollection filters , boolean overwrite , boolean preserveLastModified , String encoding ) throws IOException { } public void copyFile ( File sourceFile , File destFile , FilterSetCollection filters , Vector filterChains , boolean overwrite , boolean preserveLastModified , String encoding , Project project ) throws IOException { } public void copyFile ( File sourceFile , File destFile , FilterSetCollection filters , Vector filterChains , boolean overwrite , boolean preserveLastModified , String inputEncoding , String outputEncoding , Project project ) throws IOException { } public void copyFile ( File sourceFile , File destFile , FilterSetCollection filters , Vector filterChains , boolean overwrite , boolean preserveLastModified , boolean append , String inputEncoding , String outputEncoding , Project project ) throws IOException { } public void copyFile ( File sourceFile , File destFile , FilterSetCollection filters , Vector filterChains , boolean overwrite , boolean preserveLastModified , boolean append , String inputEncoding , String outputEncoding , Project project , boolean force ) throws IOException { } public void setFileLastModified ( File file , long time ) { } public File resolveFile ( File file , String filename ) { } public static boolean isContextRelativePath ( String filename ) { } public static boolean isAbsolutePath ( String filename ) { } public static String translatePath ( String toProcess ) { } public File normalize ( final String path ) { } public String [ ] dissect ( String path ) { } public String toVMSPath ( File f ) { } public File createTempFile ( String prefix , String suffix , File parentDir ) { } public File createTempFile ( String prefix , String suffix , File parentDir , boolean deleteOnExit , boolean createFile ) { } public File createTempFile ( String prefix , String suffix , File parentDir , boolean deleteOnExit ) { } public boolean contentEquals ( File f1 , File f2 ) throws IOException { } public boolean contentEquals ( File f1 , File f2 , boolean textfile ) throws IOException { } public File getParentFile ( File f ) { } public static String readFully ( Reader rdr ) throws IOException { } public static String readFully ( Reader rdr , int bufferSize ) throws IOException { } public static String safeReadFully ( Reader reader ) throws IOException { } public boolean createNewFile ( File f ) throws IOException { } public boolean createNewFile ( File f , boolean mkdirs ) throws IOException { } public boolean isSymbolicLink ( File parent , String name ) throws IOException { } public String removeLeadingPath ( File leading , File path ) { } public boolean isLeadingPath ( File leading , File path ) { } public String toURI ( String path ) { } public String fromURI ( String uri ) { } public boolean fileNameEquals ( File f1 , File f2 ) { } public void rename ( File from , File to ) throws IOException { from = normalize ( from . getAbsolutePath ( ) ) . getCanonicalFile ( ) ; to = normalize ( to . getAbsolutePath ( ) ) ; if ( ! ( from . exists ( ) ) ) { System . err . println ( ( "Cannot<seq2seq4repair_space>rename<seq2seq4repair_space>nonexistent<seq2seq4repair_space>file<seq2seq4repair_space>" + from ) ) ; return ; } <START_BUG> if ( from . equals ( to ) ) { <END_BUG> System . err . println ( ( ( ( ( "Rename<seq2seq4repair_space>of<seq2seq4repair_space>" + from ) + "<seq2seq4repair_space>to<seq2seq4repair_space>" ) + to ) + "<seq2seq4repair_space>is<seq2seq4repair_space>a<seq2seq4repair_space>no-op." ) ) ; return ; } if ( ( to . exists ( ) ) && ( ! ( ( from . equals ( to . getCanonicalFile ( ) ) ) || ( tryHardToDelete ( to ) ) ) ) ) { throw new IOException ( ( ( ( "Failed<seq2seq4repair_space>to<seq2seq4repair_space>delete<seq2seq4repair_space>" + to ) + "<seq2seq4repair_space>while<seq2seq4repair_space>trying<seq2seq4repair_space>to<seq2seq4repair_space>rename<seq2seq4repair_space>" ) + from ) ) ; } File parent = to . getParentFile ( ) ; if ( ( ( parent != null ) && ( ! ( parent . exists ( ) ) ) ) && ( ! ( parent . mkdirs ( ) ) ) ) { throw new IOException ( ( ( ( "Failed<seq2seq4repair_space>to<seq2seq4repair_space>create<seq2seq4repair_space>directory<seq2seq4repair_space>" + parent ) + "<seq2seq4repair_space>while<seq2seq4repair_space>trying<seq2seq4repair_space>to<seq2seq4repair_space>rename<seq2seq4repair_space>" ) + from ) ) ; } if ( ! ( from . renameTo ( to ) ) ) { copyFile ( from , to ) ; if ( ! ( tryHardToDelete ( from ) ) ) { throw new IOException ( ( ( "Failed<seq2seq4repair_space>to<seq2seq4repair_space>delete<seq2seq4repair_space>" + from ) + "<seq2seq4repair_space>while<seq2seq4repair_space>trying<seq2seq4repair_space>to<seq2seq4repair_space>rename<seq2seq4repair_space>it." ) ) ; } } } public long getFileTimestampGranularity ( ) { } public boolean hasErrorInCase ( File localFile ) { } public boolean isUpToDate ( File source , File dest , long granularity ) { } public boolean isUpToDate ( File source , File dest ) { } public boolean isUpToDate ( long sourceTime , long destTime , long granularity ) { } public boolean isUpToDate ( long sourceTime , long destTime ) { } public static void close ( Writer device ) { } public static void close ( Reader device ) { }

Fix:
if ( from . getAbsolutePath ( ) . equals ( to . getAbsolutePath ( ) ) ) {